One vertex per element, one color per generator, with an edge from x to x·s.
(3,7)(6,8)(9,10,12,14)(11,15,16,13)(17,18,21,22)(19,23,25,30)(20,27,29,24)(26,32,28,31)(33,34,39,37)(35,40,36,43)(38,41,46,45)(42,47,44,48)(2,5)(6,8)(18,22)(19,25)(24,27)(26,28)(33,35,39,36)(34,40,37,43)(38,42,46,44)(41,47,45,48)(1,2)(3,6)(4,5)(7,8)(17,18)(19,23)(20,24)(21,22)(25,30)(26,31)(27,29)(28,32)(33,36,39,35)(34,40,37,43)(38,44,46,42)(41,47,45,48)(9,11,12,16)(10,13,14,15)(17,19,21,25)(18,23,22,30)(20,28,29,26)(24,32,27,31)(33,37,39,34)(35,40,36,43)(38,45,46,41)(42,47,44,48)(1,3)(2,6)(4,7)(5,8)(17,20,21,29)(18,24,22,27)(19,26,25,28)(23,31,30,32)(33,38,39,46)(34,41,37,45)(35,42,36,44)(40,47,43,48)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.